Burroughs, W. J. (2003). Weather cycles: Real or imaginary? Cambridge,New York: Cambridge University Press.
Dyfyniad Arddull ChicagoBurroughs, William James. Weather Cycles: Real or Imaginary? Cambridge,New York: Cambridge University Press, 2003.
Dyfyniad MLABurroughs, William James. Weather Cycles: Real or Imaginary? Cambridge,New York: Cambridge University Press, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.